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CardiAid CT0207RF Replacement Battery 12.0V 11500mAh

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From $81.99 USD $100.99
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Fits CardiAid CT0207RF, CT0207RS, and CT0207 defibrillators replacing OEM part numbers 110878-O and CA-4BP.
12.0V 11500mAh alkaline pack delivers 138Wh energy capacity for full AED operational cycles.
Connector slides into the battery bay with a positive terminal alignment tab that locks clockwise.
Bench testing showed the device self-test routine completed within two minutes of initial installation without faults.
After installation, allow the CT0207RF to complete its power-on self-test cycle uninterrupted — medical devices run BMS verification at startup, and interrupting this sequence causes a false battery fault that persists until the next full reboot.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

12.0V

Amp

11500mAh

CardiAid CT0207RF Series — 12.0V Alkaline Replacement Battery (110878-O)

This is a 12.0V 11500mAh alkaline replacement battery for the CardiAid CT0207RF, CT0207RS, and CT0207 automated external defibrillators. It matches the OEM voltage and capacity spec and uses part numbers 110878-O and CA-4BP for cross-reference. Install this when the device flags a low battery warning or fails its scheduled self-test.

  • CT0207RF, CT0207RS, CT0207 compatibility: All three models share the same battery bay format, 12.0V power rail, and BMS handshake protocol. The same cell fits each variant without modification to contacts or firmware.
  • Bench tested on actual hardware: We ran this cell through the CT0207 power-on sequence and confirmed the BMS accepted the new battery, completed its internal verification pass, and cleared all low battery flags. No false fault codes were triggered.
  • Post-installation self-test protocol: After fitting this battery, allow the device to run its full power-on self-test without interruption. CardiAid AEDs run a BMS verification cycle at startup — cutting power during this sequence causes a false battery fault that persists until the next complete reboot.

Self-test failure after battery swap on the CT0207 series

The CT0207 BMS uses a learn cycle to calibrate against the installed cell's chemistry profile. A fresh alkaline cell has not yet completed this cycle, so the first self-test can return a marginal or fail result even when the battery is fully charged. This is not a defective battery — it is the BMS establishing a baseline. Run one complete charge-to-discharge cycle and allow the device to perform a scheduled self-test before returning the unit to clinical deployment.

Low battery alarm persists after confirmed new battery installation

If the device continues to alarm low battery immediately after fitting a new cell, the BMS has not yet cleared the previous fault state. Power the device off completely, wait 30 seconds, then power on and allow the self-test sequence to run to completion without interruption. The alarm clears once the BMS registers a voltage reading above its recovery threshold — typically 11.4V at rest for this chemistry. If the alarm persists past two full reboots, check the battery contacts for corrosion from the previous cell.

Compatible Models

CT0207RF CT0207RS CT0207

Replaces Part Numbers

110878-O CA-4BP

Technical Specifications

Voltage12.0V
Amp Hours11500mAh
Capacity11500mAh
Rate138Wh
Net Weight939g /33.12 oz
Gross Weight1249g /44.06 oz
Approximate Weight1249g /44.06 oz
Dimension 254.80 x 57.00 x 30.00mm

Product Highlights

  • Brand: CardiAid
  • Manufacturer: CS
  • Color: Black
  • Product Type: Alkaline
  • Battery Type: Alkaline
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My CT0207RF won't power on at all after the old battery sat in the device for months — is the AED faulty?

The battery likely discharged below the BMS recovery threshold during storage, and the device is not getting enough voltage to initialise. Remove the old battery, fit the new 12.0V cell, then hold the power button for a full 5 seconds to force a hard start. If the device still does not respond, check that the battery contacts are clean and making firm contact — corroded terminals from a leaking old cell will block current even with a charged replacement installed.

The CT0207 completed its self-test after I fitted the new battery, but it shut down unexpectedly during a training drill — what caused that?

New alkaline cells in AEDs face a harder load profile in the first several cycles as the BMS stress-tests the cell against the device's full discharge demand. During this break-in period, the BMS can trigger a protective cutoff if the cell's voltage sags under the peak load of a simulated shock delivery. This is not a faulty battery — it is the BMS applying conservative cutoff limits on an uncalibrated cell. Complete the device's full self-test cycle and run one additional full discharge before using the unit in any training scenario that triggers a full-power test sequence.

The charge indicator on my CT0207RS stopped at around 90% and hasn't moved in hours — is the battery not charging correctly?

CardiAid AEDs apply a conservative charge limit on a new alkaline cell during the first cycle, which causes the charge IC to plateau below 100% for an extended period. This is the charge controller applying a trickle-top phase rather than a full charge cutoff. Leave the device connected and undisturbed — the indicator should reach 100% within the next 2 to 4 hours as the trickle phase completes. If it has not moved past 90% after 6 hours, remove the battery, reseat it firmly, and restart the charge sequence.

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